About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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| Presentation Title |
In-situ 3D High-energy X-ray Diffraction Study on Deformation Behavior of Neutron-irradiated Fe-9%Cr |
| Author(s) |
Dominic Piedmont, James Stubbins, Xuan Zhang, Ezra Mengiste, Matthew Kasemer |
| On-Site Speaker (Planned) |
James Stubbins |
| Abstract Scope |
Understanding microstructure-property correlations over relevant length scales is of high importance for materials in extreme reactor environments. However, a major discontinuity of length scales between microstructure and bulk mechanical behavior exists; linking these is non-trivial. Presented here is a direct link between these highly contrasting length scales via grain scale (meso-scale) characterization of deformation responses in irradiated materials. Using synchrotron x-rays, high energy diffraction microscopy (HEDM) nondestructively probes mm-size samples, acquiring grain-resolved information in-situ and ex-situ. Experimental data allows for observations of grain rotation and residual strain evolutions as a function of deformation. Machine learning identified grain-scale features, confirmed by TEM, to help understand their correlation with radiation and the effects on deformation behavior. Results were obtained for Fe-9%Cr samples: two irradiated to 0.1 dpa at 300°C and 450°C, and one unirradiated sample for comparison. Experimental results are compared to simulation results from Crystal Plasticity Finite Element Modeling (CPFEM). |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, Nuclear Materials |